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A mathematical model of short-term arterial pressure regulation by the carotid baroreflex was integrated with a simple cardiovascular model to study the interactions between the baroreguation and the pusating heart. The cardiovascular system was modeled as an electric circuit, consisting of the left ventricle as a time-varying capacitance, the systemic circulation as a four-element RLC circuit, the...
This paper introduces a source localization technique that exploits the high temporal resolution of neuronal magnetoencephalography (MEG) data to locate the originating sources within the head. A traditional frequency beamforming algorithm was adapted from its conventional application of providing frequency information to yield information on the spatial location of simulated neuronal signals. This...
Osseointegration is critical for implant fixation, and mechanical stimuli play a role in this process. Our long term goal is to investigate the relationship between local mechanical environment and osseointegration. In this paper, as a first step in the study, we constructed an approximate 3D model of the in-vivo test and focused on calculating the strain fields around the implant. We first demonstrated...
An enhanced finite element model of the human femur is presented as a reliable mean for prediction of bone failure mechanism for simulations involving frontal impacts. The original finite element representation of femur which was considered in this study did not encompass node connectivity at the interfaces between cortical shaft and condylar regions. Improvements made to the original model have been...
A novel frequency domain distributed segmental arterial model was designed to predict pulsatile blood pressure waveforms in large arteries. The model was based on pulse wave reflection theories and nodal network analysis. This model was evaluated in terms of branch reflection coefficients, terminal vascular bed behavior, and arterial wall viscoelasticity. It was found that the model-based predicted...
Data was obtained from latex tube models, which replicated both healthy and diseased vessels with a plaque dome. The fluid mechanics model was used to develop code comprised of hemodynamic equations. The mechanics of the vessels were analyzed via their pressure - area relationship. The pressure area relation was determined for both a normal and plaque dome model. This relationship was applied to the...
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